high quality Bamboo Fiber Material: the bamboo fiber is lighter, breathable, elastic and softer than cotton, which can prevent sensitive scalp from the stimulation caused by chemotherapy and hot or itchy wigs, and can absorb sweat when you exercise or sweat, keeping scalp dry, comfortable and cool One Size Fits Most: our bamboo wig liner cap is suitable for most women with a head circumference of 50 cm/ 19.7 inch; The elastic function makes them cover the whole head well, without causing any burden or discomfort to your head Nice Gift: you can send the bamboo wig liner cap to friends and family who need to wear wigs or fight cancer, which can give them encouragement and express your concern and support Ample to Use and Share: the package comes with 4 pieces of bamboo wig liner cap in classic beige color, enough for you to use and replace, and you can also share them with your family and friends Functional Usage: the bamboo wig liner cap is suitable for women with alopecia or chemotherapy baldness; You can wear this bamboo fiber hat alone, or under your wig, anti cancer hat or chemical hat, friendly to skin and comfortable to wear